This isn't a question of capability (which is already there), but rather of mindset. Now that the other companies know that it's possible to sell a $1000 ARM computer that's not a phone or a toy, they'll be falling all over themselves to join in on the gold rush. Lots of absolute crap will ensue as they mindlessly bumble their way through shitty designs, and then in a few years we'll see the first decent non-apple ARM desktop and laptop computers. And by that time, Microsoft will have dusted off their ARM code, major Linux distros will be giving real love to their ARM packacing.